261133060 has 12 divisors (see below), whose sum is σ = 548379468. Its totient is φ = 104453216.

The previous prime is 261133049. The next prime is 261133091. The reversal of 261133060 is 60331162.

261133060 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 159163456 + 101969604 = 12616^2 + 10098^2 .

261133060 is strictly pandigital in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6528307 + ... + 6528346.

It is an arithmetic number, because the mean of its divisors is an integer number (45698289).

Almost surely, 2^261133060 is an apocalyptic number.

261133060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261133060 is an abundant number, since it is smaller than the sum of its proper divisors (287246408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261133060 is a wasteful number, since it uses less digits than its factorization.

261133060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13056662 (or 13056660 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 261133060 is about 16159.6120002926. The cubic root of 261133060 is about 639.1762350820.

The spelling of 261133060 in words is "two hundred sixty-one million, one hundred thirty-three thousand, sixty".